Drews



EWART SIGMUND ANDREWS, OF BEOKENHAM, ENGLAND.

VAPORIZER FOR LIQUEFIED GASES.

Specification of Letters Patent.

Patented May 23, 1922.

Application filed August 21, 1920. Serial No. 405,158.

To aZZ whom. it may concern Be it known that I, EWART SIGMUND AN- nnnws, a British subject, residing at 22 Manor \Vay, Beckenham, in the county of Kent, England have invented certain new and useful Improvements in Vaporizers for Liquefied Gases, of which the following is a specification.

This invention relates to vaporizers for gases which are in gaseous form at normal temperature and pressure but which are capable of being stored in liquefied form at low temperatures; such gases in liquefied form are hereinafter referred to as liquefied gases.

Examples of such gases are oxygen and nitrogen which have extremely low temperatures. in the liquefied form but which can be stored in heat-insulated containers.

The object of the invention is to provide an improved vaporizer fitting for such liquefied gas containers by means of which at ordinary temperature can be drawn oii' at regulated quantity of flow.

The vaporizer fitting constructed in accordance with the present invention is capable of being readily attached to and detached from the liquefied gas container; one vaporizer fitting can therefore be employed for a number of containers since the latter spend an appreciable portion of their life running backwards and forwards to the filling station.

in the accompanying drawing,

Fig. 1 represents in diagrammatic form a sectional elevation through the improved vaporizer showing its attachment to the liquid container.

Fig. 2 represents a section on the line X X of Fig. 1, the container neck and siphon tube being omitted. The vaporizer oomprises a sleeve I) screwed to the top of the neck a of the liquefied-gas container A.

This sleeve is secured to a gapped top plate B provided with a removable closure 0 and has passing through it a siphon tube 7) which passes down the neck of the container and extends nearly to the bottom thereof. This tube then passes around the neck of the container in the form of a helix and enters an annular boiler c.

This boiler is shown provided with a plurality of battles e which are fixed at the bottom to the boiler and which do not extend to the upper surface thereof.

Fins e or equivalent means are provided to increase the radiating surface of the boiler.

A pipe f passes from the boiler at a point opposite to the point of inlet of the pipe at and passes in helical form to the top, and emerges through the top plate B.

A throttle valve 9 is secured to this outlet pipe.

A second pipe 71. passes through the sleeve Z) and out through the top plate B; if desired this pipe may be provided with a helix between the sleeve and top plate to prevent the gas emerging therefrom from being at too low a temperature.

A release valve is is placed upon this pipe it and a pressure gauge Z is provided to indicate the pressure therein.

The action of the apparatus is as follows:

Assuming that the throttle valve 9 is open, the pressure generated in the neck of the bottle, due to the slow boiling of the liquid in the container caused by the leakage of external heat thereto, causes the liquid to pass up the siphon tube 423 and thence through the inner coil into the boiler. The temperature of this boiler being very high compared with that of the liquid, which has dropped into the boiler this liquid iinmediately vaporizes and sets up a back pressure which drives the liquid back through the tube. The vaporized gas passes in both directions around the annular boiler over the baflies and out through the pipe f, outer helix, and throttle valve 9, and when sufii cient gas has escaped to bring the pressure inside the boiler less than that in the neck of the container further liquid will pass over into the boiler.

The apparatus thus pumps over liquid automatically at a rate determined by the setting of the throttle valve g.' When the throttle valve 9 is closed the gas escaping by ebulli'tion from the surface of the liquid passes out through the release valve k.

A perforated metal or meshwork case D is attached to the top plate B and supports the boiler.

I claim:

1. In a vaporizer attachment for a liquefied gas container having an elongated neck, the combination of a siphon tube passing into the liquefied gas container down the neck, a boiler into which said tube leads, a tube leading out of said boiler at a point remote from the inlet thereto, a throttle valve attached to said tube and means for detachably securing said attachment to the neck of the container.

2. In a vaporizer attachment for a lique- I fied gas container having an elongated neck, the combination of a closed sleeve detachably secured to the neck of the container, a siphon tube passing from the container up the neck thereof through said sleeve, an extension of said siphon tube, a boiler into which the extension of said tube leads, a tube leading out of said boiler at a point remote from the inlet thereto, a throttle valve attached to said tube and means for detachably securing said attachment to the neck of the container.

3. In a vaporizer attachment for a liquefied gas container having an elongated neck, the combination of a closed sleeve detachably secured to the neck of the container, a siphon tube passing from the container through said sleeve, an annular boiler arranged concentrically about said neck, a helical extension of said siphon tube leading into said boiler, a helical tube leading out of said boiler at a point remote from the inlet thereto, a throttle valve attached to said tube and means for detachably securing said attachment to the neck 01 the container.

4. In a vaporizer attachment for a liquefied gas container having an elongated neck, the combination of a closed sleeve detachable secured to the neck of the container, a siphontube passing from the container through saidsleeve, a tube leading through the sleeve from the upper portion of the neck of the container, a release valve secured to said tube, an extension of said siphon tube, a boiler into which the extension of said tube leads, a tube leading out of said boiler at a point remote from the inlet thereto, a throttle valve attached to said tube and means for detachably secnrin said attachment to the neck of the con tamer.

5. In a vaporizer attachment for a liquefied gas container having an elongated neck, the combination of a closed sleeve detach- 'abl secured to the neck of the container, a

cured to said tube, an annular boiler surrounding said neck, a helical extension of said siphon tube leading to said boiler, a helical tubeleading out of said boiler at a point remote from the inlet thereto, a throttle valve attached to said tube and means for detachably securing said attachment to the neck of the container.

6. In a vaporizer attachment for a liquefied gas container having an elongated neck, the combination of a sleeve detachably secured to the neck oi the container, a detachable closure secured to said sleeve, a siphon tube passing from the container up the neck thereof and transversely through said sleeve, an extension of said siphon tube, a boiler into which the extension of said tube leads, a tube leading out of said boiler at a point remote from the inlet thereto, a throttle valve attached to said tube and means for detachably securing said attachment to the neck of the container.

7. In a vaporizer attachment for a liquefied gas container having an elongated neck, the combination oi a siphon tube passing into the liquid container, an annular boiler surrounding said neck into which said tube leads, radiating elements attached to such boiler, a tube leading out of said boiler at a point remote from the inlet thereto; a throttle valve attached to said tube and means for detachably securing said attachment to the neck oi? the container.

8. In a vaporizer attachment for a liquetied gas container having an elongated neck, the con'ibination oi a closed sleeve detachably secured to the neck of the container, a detachable closure secured to said sleeve, a siphon tube passing from the container through said sleeve, a tube leading through sleeve from the upper portion of the neck of the container, a release valve secured to said tube, a helical extension of said siphon tube, a boiler into which the extension of the tube leads, radiating pins attached to said boiler a helical tube leading out of said boiler at a point remote from the inlet thereto, athrottle valve attached to said tube and means for detachably securing said attachment to the neck of the container.

In testimony whereo'l I afiix my si nature.

nwanr SIGMUND .annntws. 

